The error instructs you to look at line 455 in /usr/local/apache/conf/httpd.conf. That line likely starts with NameVirtualHost, which is no longer necessary. But it is a warning, not an error. Also take a look in the logs (your configuration appears not standard; check in /var/log for the httpd logs).

Email codedump link for NameVirtualHost has no effect and will be removed in the next release